Loans (Loans By Categories) (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Loans by categories [Abstract]
Total loans		$ 2,488,760	$ 1,824,245	$ 1,683,377
SBL Non Real Estate [Member]
Loans by categories [Abstract]
Total loans		293,488	84,579	84,181
SBL Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans		270,264	218,110	209,008
SBL Construction [Member]
Loans by categories [Abstract]
Total loans		27,169	45,310	38,116
Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans		430,675	434,460	412,755
SBLOC/IBLOC [Member]
Loans by categories [Abstract]
Total loans		1,428,253	1,024,420	920,463
Other Specialty Lending [Member]
Loans by categories [Abstract]
Total loans		2,194	3,055	$ 3,167
Consumer Loan [Member]
Loans by categories [Abstract]
Total loans			4,554
Unamortized Loan Fees And Costs [Member]
Loans by categories [Abstract]
Total loans		$ 6,308	9,757
Pass [Member]
Loans by categories [Abstract]
Total loans			1,698,263
Pass [Member] | SBL Non Real Estate [Member]
Loans by categories [Abstract]
Total loans			76,108
Pass [Member] | SBL Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans			208,809
Pass [Member] | SBL Construction [Member]
Loans by categories [Abstract]
Total loans			44,599
Pass [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans			420,289
Pass [Member] | SBLOC/IBLOC [Member]
Loans by categories [Abstract]
Total loans			942,858
Pass [Member] | Other Specialty Lending [Member]
Loans by categories [Abstract]
Total loans			3,055
Pass [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans			2,545
Special Mention [Member]
Loans by categories [Abstract]
Total loans			5,294
Special Mention [Member] | SBL Non Real Estate [Member]
Loans by categories [Abstract]
Total loans			3,045
Special Mention [Member] | SBL Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans			2,249
Substandard [Member]
Loans by categories [Abstract]
Total loans			19,855
Substandard [Member] | SBL Non Real Estate [Member]
Loans by categories [Abstract]
Total loans			4,430
Substandard [Member] | SBL Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans			5,577
Substandard [Member] | SBL Construction [Member]
Loans by categories [Abstract]
Total loans			711
Substandard [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans			8,792
Substandard [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans			345
Unrated Not Subject To Review [Member]
Loans by categories [Abstract]
Total loans	[1]		100,833
Unrated Not Subject To Review [Member] | SBL Non Real Estate [Member]
Loans by categories [Abstract]
Total loans	[1]		996
Unrated Not Subject To Review [Member] | SBL Commercial Mortgage [Member]
Loans by categories [Abstract]
Total loans	[1]		1,475
Unrated Not Subject To Review [Member] | Direct Lease Financing [Member]
Loans by categories [Abstract]
Total loans	[1]		5,379
Unrated Not Subject To Review [Member] | SBLOC/IBLOC [Member]
Loans by categories [Abstract]
Total loans	[1]		81,562
Unrated Not Subject To Review [Member] | Consumer Loan [Member]
Loans by categories [Abstract]
Total loans	[1]		1,664
Unrated Not Subject To Review [Member] | Unamortized Loan Fees And Costs [Member]
Loans by categories [Abstract]
Total loans	[1]		$ 9,757

[1] For information on targeted loan review thresholds see “Allowance for Loan Losses” in the 2019 Form 10-K in the loans footnote and in this Form 10-Q in the Management’s Discussion and Analysis of Financial Condition and Results of Operations.